This script isn't running because he needs "function arguements" Help?

So I have a script placed in Workspace as well as a BindableFunction that forces the script to update. Basically, the script is suppose to remove all weapons if you are on a team. I have scripts that award you weapons if you have a gamepass, and that is why I want this script to remove tools. In case people have these weapons inside the lobby. Anyways, the output says "Workspace.Script:8: function arguments expected near 'for'" I'm actually not sure what a function argument is, I tried the Wiki. I couldn't understand it. If someone could also give a briefing on what that is, it would be very helpful. Here is the script.

local Workspace = script.Parent
local ForceUpdateFunction = Workspace:WaitForChild("ForceUpdate")

local function Update()
	local player = game.Players.LocalPlayer
	if player.TeamColor == game.Teams.Lobby.TeamColor then
		local p = player.Backpack:GetChildren
		for i = 1,#p do
			p[i]:Remove()
		end
	end
end
function ForceUpdateFunction.OnInvoke()
	Update()
end
while true do
	wait(2)
	Update()
end

I think your problem is in line 7, simply because you forgot the two parentheses after GetChildren. It should be GetChildren().